Centralized radio system



June; 25, 1935. B. E. MORITZ, JR

CENTRALIZED RADIO SYSTEM Filed Sept. 3, 1952 4 Sheets-Sheet 1 INVENTOR. Burl E. Mar/27, Jr.

A TTORNEYS June 25, 1935. v B. E. MORITZ, JR 2,006,077

CENTRALIZED RADIO SYSTEM Filed Sept. 3, 1932 4Sheets-Sheet 3 I N VEN TOR.

June 25, 1935. B. E. MORITZ, JR 2,006,077

CENTRALIZED RADIO SYSTEM Filed Sept. 3, 1932 4 Sheets-Sheet 4 IN VEN TOR.

A TTORNEY5 Patented June 25, 1935 F UNITED STATES PATENT orrlca v v M 2,006,077 OENTRALIZED RADIO SYSTEM Burt E. Moritz, Jr., Denver, 0010., assignor to K. G. M. Radio Corporation, Denver, 0010., a corporation of Colorado Application September 3, 1932, Serial No. 631,695 '2 Claims. (01. 179-7.1)

My invention relates to a controlling and recast receivers directly connected to suitable ancording system for supplying. radio program and tennas for receiving broadcast programs. C inditelevision service or similar information'tcoccu= cates a plurality of amplifiers for amplifying pants of hotel rooms, apartments, hospitals, and l the programs received by the receivers, these am-.

various oflices and rooms in ofiice buildings, plifiers being connected individually to the main 5 banks, factories, and thelike. trunk lines I3 which lead throughout the build- 0 My invention contemplates the provision of a ing to the distribution boxes H which are emmain distributing station which in the case of played to distribute the program to the various radio and television may be the receiving station lateral or vertical lines leading to the rooms of a for'receiving broadcast programs in combination floor or to the floor as the case may be. As shown, 10 1 with a central controlstation including a switch the control box 14 connects the main trunk lines arrangement for supplying or cutting oil the to the lateral lines as indicated at l5 which latprogram service and a recording or metering syseral lines lead to a plurality of individual statem for maintaining a permanent record of all tions l and 2. In the form shown in Fig. 1, each 1fi service supplied to. the various rooms or subindividual station such as I and 2 includes aloud stations .fed'from the central station. speak r a volume control 2', and a station More specifically my invention contemplates selector 4 which enables the individual subscriber the provision in combination of a central broadto Select a y 0118 Of a plurality of receiverst cast receiving station and a multiplicity of indi- Now when the guest wants radio'reoeption from n vidual t t h re the programs received by his room unit, he presses the push button 6 which 20 the central station may be used by subscribers manually operates the armature of relay 8 closing together with a central control station embodythe contactsof this relay. When the relay coning a meteringsystem for maintaining a record tacts are closed, the voice circuit to the speaker in permanent former the individual service deis closed from the central receiverB through the livered to each of the individual stations. amplifier, the main trunk line, the auxiliary trunk 25 My invention also contemplates as one of its line, selector 4, the loud speaker, and contacts a objects the provision of a novel metering system of the armature back through the selector 1' to which automatically takes care of therecording the receiving station B. This puts the speaker of. the time servicedelivered to any individual into normal operation, and it may be further 1 station. regulated by the guest to obtain the proper volume 30 Other and more specific objects. and advanby use of the volume control at 2. tages of the invention will appear as the descrip- The pushing of the button 6 by the operator tion proceeds in connection with the accompaalso closes the control or metering circuit at connyingdrawings wherein the preferred form of tacts b, and relay 3 looks itself energized at this 1 the invention is shown. It is to be understood, time under control of the switch [2 in the follow- 35 however, that the drawings. and description are ing manner:

illustrative only and are not to be taken as lim- The closing of the contacts b completes a' ciriting the invention except in so far as it is limited Quit from the ground at 5 through the coil of by the claims. relay 3 and over the control conductors IE to 40 In thedraWihgS- 1 the main control cable 8 leading from the dis- 40 F 1 is an assembled v w wing diagramtribution box M then through this main control matic y he several component parts mak ng p cable to the repeated relay at 9 correspondingto the y the individual 'subscribers station l,.then to bat- F g. 2 i a detailed View i Perspective of a teryl 1. and through switch IE to ground. Ener-.

metering d vi p d; gizing of relay 9 closes a circuit through the' F 3 is a detailed View 0f modified form 0f secondaryof the transformer II and through the mete g d an recording unit of the metering device' II which Figs. 4, 5; and 6 illustrate various forms of concorresponds to the individual station I thus start-i necting means which maybe used to connect the ing the recording of the time the subscriber uses individual subscribers stations to the central the service. Relay 3 looks itself energized over control station and the metering device. the path just described and will remain energized Referring now in detail to the drawings, I will until switch I2 is open, or until the contact is describe briefly the different component parts or broken at c. The switches c are preferably the main system. located atthe clerks desk. The subscriber can t In this system B indicatesa series otthe bro'adturn off his local station by using the open set of 55 more if desired.

contacts on the station selector 4. It is to be understood, of course, that cable 8 is really made up of a plurality of small conductors separately connecting each of the control wires It to an individual relay 9 so that the closing of any relay 3 will cause the closing of the corresponding relay 9 to connect up the proper metering unit ill for that particular subscribers station. The transformer H receives its power over the conductors A from any suitable source of current.

Referring now to Fig. 2 in connection with Fig. 1, it will be noted that the unit i shown merely diagrammatically in Fig. 1 consists of a series of heating elements 22, 23, 2%, etc. which heating elements are in series with the conductor i8 leading from the secondary of the transformer and such conductors as 59, 2E], and 2! leading to the repeater relays 9. These heater units etc. are mounted on a suitable frame member 25 and pass over the edge 26 thereof where they contact with the sensitized record sheet El. This record sheet 21 is carried on rolls 28 and 29 which rolls are driven by clock mechanism indicated diagrammatically at t The heated element 22 oxidizes the emulsion on the roll 2'! and thus produces a line'on the roll wherever the paper comes in contact with one of the heated elements. The paper 21 is moved past the edge 26 of the member 25 at the rate of about four inches a day or Thus a graphic record of the time when a subscribers station is turned on and off is permanently formed on the paper 21.

In the sensitizing of the paper 21, I preferably use an emulsion solution sensitive to heat which consists of a one per cent solution of sulphuric acid. The paper is first Wet with water and the solution is then applied by dipping the paper in the solution as it rolls about a drum. The paper is then dried by passing it over several other rollers which places it in condition for use. The action of the heat when applied to the coated paper is to dehydrate the sulphuric acid and cause it to attack the fiber in the paper and thus make a line that i s'clearly visible.

I may also use another solution for coating the paper in the same manner which consists of a solution containing one half of one per cent mercuric nitrate and one and one-half per cent glycerin. The paper is prepared in the same fashion as in the case of the sulphuric acid. In

this case, however, upon the application of heat to the paper, the mercuric nitrate actually breaks down with heat thus making a color providing a line, and the glycerin merely preserves the paper.

I find that the sulphuric acid solution is more sensitive to heat and, therefore, is better for my purpose as it takes less current in the heating element. In a large installation where a large number of elements are in use, the amount of current used by the metering device becomes an appreciable factor and makes the sulphuric acid treated paper more economical.

Referring now to'Fig. 3, I have shown another meter which may be utilized for the same purpose as that shown in Fig. 2. This meter which I have numbered IE3 is connected to the wires l8, [9,20, and 2i in the same fashion as meter Hi. In this case, however, the contacts 35, 32, 33, etc. directly engage the paper 3A which is electrically sensitized, and current passes through this paper to the metal roller 35 that is directly connected to the lead is. The passing of current through the paper at the point of contact causes the formation of a line in the same fashion as de-' scribed in connection with Fig. 2.

Referring now to Fig. 4, the circuit included within the dotted lines is contained in the subscribers station, and the remainder of the circuit constitutes the connecting leads and switching devices for the metering apparatus. The switches it and 4.! are normally closed.

A subscriber desiring broadcast service, presses the button 42 closing the contacts 63 which in turn closes a circuit through the relay id and completes the voice circuit through the loud speaker 55 over the leads l6 and ti which lead to the broadcast receiver such for example at B of Fig. '1. Closing of the circuit at 53 also completes a circuit over conductor t8 through the coil of relay G9, switch M3, battery 58, and switch H to ground. The armature 43' of relay M is grounded so relay M is locked energized at this time. Relay 49 actuates its armature 51 to close the circuit over conductor 52 to the metering device which records the time the station is in use in the manner already described.

The switch 4! is a master switch operated if desired by means of a time clock that is set to open switch H at a suitable hour at night and thus prevent all radio service after the hour set by the management of the hotel. The switch 40 at the clerks desk is used when a man checks out before the end of the day, and there is sufficient time to rerent the speaker. This switch 40 is often used when a man decides to change his room and after he has pressed the button 42 of Fig. 4:, only occupying the room a short while.

In Fig. 5, this figure differs from Fig. 4 only in the fact that the subscriber must call into the local operator who closes the switch 59' to energize relay M and thus give the subscriber radio service. Closing of the switch 55 connects the metering device'over the lead 52 and at the same time connects battery 58 to relay it to close the armature at 43 for the subscribers loud speaker.

Fig. 6 merely shows the same structure as in Fig. with the exception that it uses a single battery Eli. and a single pole switch 48" to set both the subscribers station and the metering device in operation.

The preferred form of structure is that shown in Figs. 1 and 4, and the wiring devices shown in Figs. 5 and 6 are merely modifications which may be employed.

It is believed to be clear from the foregoing description that I have provided a simple system wherein the individual subscribers may obtain the broadcast service with a minimum amount of difficulty and one in which the metering of the service is automatically taken care of without any operation by either the subscriber or the clerk other than that of merely turning the system on and off and turning on and off the individual subscribers station. The subscriber turns it on, and the clerk turns it off, only when necessary, before the time clock. In the system shown in Fig. 1, if it is desired to turn oif an individual subscribers station, then it is only necessary for the clerk to open one of the switches 0 corresponding to the particular station. Switches 0 are located convenient to the clerks desk so that she may cut off the individual subscribers station at the subscribers request.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A system of the character described comprising a central station having units for receiving a plurality of programs simultaneously, a plurality of subscriber's stations each including a selector for selectively connecting it to said units, a control connector individual to each subscribers station for connecting the subscribers station to the central station, and a metering device actuated by the control connector for recording the time of connection between the subscribers station and the central station, said selector being operable to tem porarily break connection with the central station in transferring the subscriber's station from one unit to another without stopping the metering device.

2. A system of the character described comprising a central station having units for receiving a plurality of programs simultaneously, a plurality of subscribers stations each including a selector for selectively connecting it to said units, a control connector individual to each subscriber's station for connecting the subscribers station to the central station, and a metering device actuated by the control connector for recording the time of connection between the subscribers station and the central station, said control connector including a manually operable means at the subscribers station for making connection, and holding means common to the subscribers station, central station connection, and the metering device for maintaining the connection, said selector being operable to: temporarily break connection with the central station in transferring the subscribers station from one unit to another without stopping the metering device.

BURT E. MORITZ, JR. 

